From ba1d8264e65b37146dbc26c71c748b5c7020ae88 Mon Sep 17 00:00:00 2001
From: Devang Patel <dpatel@apple.com>
Date: Mon, 4 Jan 2010 23:04:36 +0000
Subject: [PATCH] Fix debug_inlined section entries for routines whose names
 are changed through __asm() extension.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92533 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/AsmPrinter/DwarfDebug.cpp   | 15 ++++++++++-----
 test/FrontendC/2010-01-05-LinkageName.c | 15 +++++++++++++++
 2 files changed, 25 insertions(+), 5 deletions(-)
 create mode 100644 test/FrontendC/2010-01-05-LinkageName.c

diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 3b0d74db814..a65a385f440 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -1393,7 +1393,16 @@ DIE *DwarfDebug::constructInlinedScopeDIE(DbgScope *Scope) {
     I->second.push_back(std::make_pair(StartID, ScopeDIE));
 
   StringPool.insert(InlinedSP.getName());
-  StringPool.insert(InlinedSP.getLinkageName());
+  StringRef LinkageName = InlinedSP.getLinkageName();
+  if (!LinkageName.empty()) {
+    // Skip special LLVM prefix that is used to inform the asm printer to not
+    // emit usual symbol prefix before the symbol name. This happens for
+    // Objective-C symbol names and symbol whose name is replaced using GCC's
+    // __asm__ attribute.
+    if (LinkageName[0] == 1)
+      LinkageName = LinkageName.substr(1);
+  }
+  StringPool.insert(LinkageName);
   DILocation DL(Scope->getInlinedAt());
   addUInt(ScopeDIE, dwarf::DW_AT_call_file, 0, ModuleCU->getID());
   addUInt(ScopeDIE, dwarf::DW_AT_call_line, 0, DL.getLineNumber());
@@ -2918,8 +2927,6 @@ void DwarfDebug::emitDebugInlineInfo() {
   for (SmallVector<MDNode *, 4>::iterator I = InlinedSPNodes.begin(),
          E = InlinedSPNodes.end(); I != E; ++I) {
 
-//  for (ValueMap<MDNode *, SmallVector<InlineInfoLabels, 4> >::iterator
-    //        I = InlineInfo.begin(), E = InlineInfo.end(); I != E; ++I) {
     MDNode *Node = *I;
     ValueMap<MDNode *, SmallVector<InlineInfoLabels, 4> >::iterator II
       = InlineInfo.find(Node);
@@ -2937,13 +2944,11 @@ void DwarfDebug::emitDebugInlineInfo() {
       // __asm__ attribute.
       if (LName[0] == 1)
         LName = LName.substr(1);
-//      Asm->EmitString(LName);
       EmitSectionOffset("string", "section_str",
                         StringPool.idFor(LName), false, true);
 
     }
     Asm->EOL("MIPS linkage name");
-//    Asm->EmitString(Name);
     EmitSectionOffset("string", "section_str",
                       StringPool.idFor(Name), false, true);
     Asm->EOL("Function name");
diff --git a/test/FrontendC/2010-01-05-LinkageName.c b/test/FrontendC/2010-01-05-LinkageName.c
new file mode 100644
index 00000000000..9c1a2155032
--- /dev/null
+++ b/test/FrontendC/2010-01-05-LinkageName.c
@@ -0,0 +1,15 @@
+// RUN: %llvmgcc -O2 -S -g %s -o - | llc -o 2010-01-05-LinkageName.s -O0 
+// RUN: %compile_c 2010-01-05-LinkageName.s -o 2010-01-05-LinkageName.s
+
+struct tm {};
+long mktime(struct tm *) __asm("_mktime$UNIX2003");
+tzload(name, sp, doextend){}
+long mktime(tmp)
+     struct tm *const tmp;
+{
+  tzset();
+}
+timelocal(tmp) {
+  return mktime(tmp);
+}
+